JP2014045538A - Charging type fan device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charging type fan device capable of lengthening service life of a battery even when the battery is installed on a device body, while facilitating charging into the battery.SOLUTION: During shutdown of a control circuit 31, a battery power supply switch 18 is turned off and power supply from a battery 25 to a regulator 35 is shut down. When an AC adapter 50 is connected with a DC jack 9 during shutdown, on the other hand, DC power of the AC adapter 50 is input into the regulator 35, so that the regulator 35 generates a control voltage and the control circuit 31 starts.

Description

  The present invention relates to a rechargeable fan device that sucks or delivers gas by rotating a fan with battery power.

  As a rechargeable fan device that operates by the power of a battery, a dust collector that collects dust by sucking outside air, a blower that sends out gas, and the like are known. Of these, vacuum cleaners (cleaners) and air cleaners are generally known as dust collectors, and as blowers, for example, blowers that send high-pressure air of 10 kPa or more, or air at a lower pressure than blowers are used. A fan for sending air is known.

  These rechargeable fan devices are equipped with a rechargeable battery, and the motor is driven by the power of the battery so that the fan is driven to rotate by the driving force of the motor. The driving of the motor is generally controlled by a control circuit such as a microcomputer or a control IC. In general, the battery is housed in a battery pack, and the battery pack is configured to be detachable from the apparatus main body case.

  Various methods for attaching and detaching the battery pack in the rechargeable fan device are known, for example, a configuration in which the battery pack is inserted from the opening of the device main body case into the device main body case and the opening is closed with a lid, What was comprised so that a battery pack could be directly attached or detached with respect to the side surface of an apparatus main body case is known (for example, refer patent document 1).

JP 2010-178773 A

  However, in the rechargeable fan device as described above, it is necessary to remove the battery pack from the device body case every time the battery is charged, and to reattach the battery pack to the device body case after the charging is completed. There was a problem that work was troublesome.

  In addition, the rechargeable fan device operates on the power of the battery, so that the battery can last a little longer by suppressing unnecessary power consumption not only during the fan operation but also when the fan is not operating. It is desirable to be able to do that.

  The present invention has been made in view of the above problems, and provides a rechargeable fan device that can make a battery last for a long time even when the battery is attached to the main body of the apparatus while allowing the battery to be easily charged. For the purpose.

  The present invention, which has been made to solve the above problems, includes a fan for sucking or delivering gas, a motor for rotationally driving the fan, a battery for supplying power to the motor, and input DC power. And a control voltage generating means for generating a control voltage having a predetermined voltage value.

  In addition, as for supplying DC power to the control voltage generating means, a battery power supply path for supplying DC power from the battery to the control voltage generating means, and a DC jack for inputting DC power from an external DC power supply And an external power supply path for supplying the DC power to the control voltage generating means when DC power is input to the DC jack, and further includes a semiconductor switch for conducting and blocking the battery power supply path.

  And the control means which operate | moves using the control voltage produced | generated by the control voltage production | generation means as a power supply is provided. This control means controls the drive of the motor by controlling the power supply from the battery to the motor, and if the DC charging power is input to the DC jack and the predetermined charging execution condition is satisfied, the DC It is configured to control charging of the battery with electric power, and when a predetermined shutdown condition is satisfied during its own operation, the semiconductor switch is turned off to cut off the power supply from the battery to the control voltage generating means.

  In the rechargeable fan device of the present invention configured as above, the battery power is supplied to the control means (directly from the control voltage generating means) by turning off the semiconductor switch when the shutdown condition is satisfied. Control voltage input) is cut off. On the other hand, when there is no control voltage input to the control means and the control means stops operating, if DC power is input from the DC jack, a control voltage is generated by the DC power and the control means starts operating. To do. At this time, the control means charges the battery if the charging execution condition is satisfied.

  Therefore, according to the rechargeable fan device of the present invention, it is not necessary to remove the battery from the device body as in the prior art in order to charge the battery, and only DC power is input from the external power source to the DC jack. The battery can be charged. Moreover, when the shutdown condition is established, the control means stops power supply and does not consume any power. Therefore, the battery can be easily charged, and the battery can be extended for a long time even when the battery is attached to the apparatus main body.

  The rechargeable fan device of the present invention may be further configured so that the control means can be activated by a user operation. Specifically, an operation switch operated by a user to rotate the fan and semiconductor switch-on means are provided. The semiconductor switch-on means is for supplying DC power from the battery to the control voltage generating means by turning on the semiconductor switch when the operation switch is operated when the semiconductor switch is turned off.

  According to the rechargeable fan device configured in this way, even when the power to the control means is shut off and the control means stops operating, the semiconductor switch is turned on when the user operates the operation switch. The power supply to the control means is started and the control means starts operating. As a result, the rotational drive of the fan can be started quickly.

  Also, according to such a configuration, the control means that has stopped operating due to the shutdown of the power supply due to the establishment of the shutdown condition is quickly activated by either the DC power input from the DC jack or the operation of the operation switch. be able to.

  The control means may control to turn on the semiconductor switch at a predetermined timing after the operation is started. In this way, the control means can continue to supply power to itself by its own control (semiconductor switch ON control) after starting the operation, and can operate stably. .

  Various specific configurations of the control voltage generating means are conceivable. For example, the configuration may be as follows. In other words, the control voltage generation means supplies the regulator via the DC power and battery power supply path from the regulator that generates the control voltage based on the input DC power and the DC power supply that is supplied via the external power supply path. Input power selection means for supplying one of the DC power from the battery to the regulator with a high voltage value.

  That is, a regulator for generating a control voltage from DC power supplied from the outside through a DC jack and a regulator for generating a control voltage from DC power of the battery are not provided separately, but one A control voltage is generated by a regulator. The input power source selection means selects which DC power is used to generate the control voltage.

According to the rechargeable fan device configured as described above, the control voltage generating means can be realized with a simple configuration, and accordingly, the entire device can be reduced in size and cost.
The control means may include an external power input determination means, a charge execution condition determination means, and a charge control means as a specific configuration for controlling the charging of the battery. The external power input determining means determines whether or not DC power is input from the DC jack after the operation of the control means itself is started. The charge execution condition determination unit determines whether or not the battery satisfies a predetermined charge execution condition when the external power input determination unit determines that the DC power is input from the DC jack. The charging control unit controls charging of the battery by the DC power from the DC jack when the charging execution condition determining unit determines that the charging execution condition is satisfied.

  According to the rechargeable fan device configured as described above, even if the control unit stops operating, if the DC unit receives DC power from the DC jack, the control unit starts quickly and satisfies the charging execution condition. Perform charging. Therefore, charging can be quickly and reliably started by inputting a direct current to the DC jack.

It is a perspective view showing the appearance of the handy cleaner of an embodiment. It is a block diagram showing the circuit structure of a battery pack and a control circuit board. It is explanatory drawing for demonstrating the flow until a control circuit starts. It is a flowchart showing the motor drive and charge control process performed by a control circuit. It is a perspective view showing the external appearance of the rechargeable blower of a modification.

Preferred embodiments of the present invention will be described below with reference to the drawings.
In the present embodiment, the present invention is applied to a rechargeable electric vacuum cleaner (hereinafter referred to as “handy cleaner”) 1 that operates by receiving power supply from a rechargeable battery.

  As shown in FIG. 1, the handy cleaner 1 of the present embodiment includes a suction port 3 that sucks outside air at the tip of a body case 2 formed in a cylindrical shape, and dust is removed from the side wall of the body case 2. A discharge port 4 for discharging the air is provided, and a grip portion 5 for a user to hold by hand is provided on the rear end side of the main body case 2.

  An electronic switch 10 is provided at the upper end portion of the grip portion 5 so that the user can operate it while holding the grip portion 5, and a battery 25 (see FIG. 2) is provided in front of the electronic switch 10. LED14 which is turned on when charging is provided.

  The electronic switch 10 includes two operation switches that are turned on when the user is operating (pressing) and turned off when the user is not operating. Of these two operation switches, one is set as a drive switch 11 for inputting a drive command, and the other is set as a stop switch 12 for inputting a stop command.

  Although not shown directly in FIG. 1, a suction fan 6, a motor 7, a battery pack 20, and a control circuit board 30 are provided in the main body case 2 of the handy cleaner 1. .

  The suction fan 6 is for sucking outside air from the suction port 3 into the main body case 2 and discharging it from the discharge port 4, and a filter storage portion (for storing a filter for removing dust from the sucked outside air ( It is disposed at a position facing the suction port 3 with a not-shown) in between.

  In this embodiment, the motor 7 is a direct current motor, and is disposed on the side opposite to the suction port 3 of the suction fan 6. A suction fan 6 is connected to the rotating shaft of the motor 7. As a result, the motor 7 can rotate the suction fan 6 by its own rotation to suck the outside air into the main body case 2.

  As shown in FIG. 2, the battery pack 20 is a battery comprising a plurality of chargeable / dischargeable (three in this embodiment) lithium ion battery cells (hereinafter simply referred to as “cells”) 21, 22, and 23 connected in series. 25 and a cell temperature detecting thermistor 26 for detecting the temperature of each of the cells 21 to 23 are housed in a synthetic resin battery case (not shown). As shown in FIG. 1, the battery pack 20 is stored in a battery pack storage portion (not shown) formed on the lower rear end side in the main body case 2 of the handy cleaner 1.

  That is, in the handy cleaner 1, the lid 8 is detachably provided at the lower end portion of the grip portion 5 (the rear end portion of the main body case 2). When the lid 8 is removed from the main body case 2, an opening appears at the rear end of the main body case 2, and the battery pack 20 can be stored by inserting the battery pack 20 into the battery pack storage from the opening. it can.

  A DC jack 9 is provided on the upper side wall of the main body case 2, and an LED 14 is provided on the upper surface side of the main body case 2. The control circuit board 30 is disposed in the main body case 2 above the motor 7 and in the vicinity of the electronic switch 10 and the LED 14.

  As shown in FIG. 2, the control circuit board 30 receives power from the AC adapter 50 to charge the battery 25 and receives power from the battery 25 to discharge the motor 7 (in other words, Various electronic components for driving the motor 7) are assembled.

  The AC adapter 50 is for receiving a power supply from an AC power source, generating a DC voltage (DC power) for charging the battery 25, and supplying a constant charging current via the control circuit board 30. The handy cleaner 1 is a separate body.

  For this reason, a DC jack 9 is provided on the upper portion of the side wall of the main body case 2, and a DC plug 51 provided at the tip of the power cord drawn from the AC adapter 50 is inserted into the DC jack 9, thereby DC power can be supplied from 50 to the control circuit board 30.

  Next, the circuit configuration of the control circuit board 30 will be described. As shown in FIG. 2, the control circuit board 30 is formed with a discharge path through which current flows from the positive side of the battery 25 to the negative side of the battery 25 via the motor 7.

  A discharge control FET 15 that controls the discharge current from the battery 25 to the motor 7 (that is, the drive current of the motor 7) is provided on the negative electrode side of the motor 7 in the discharge path.

  The control circuit board 30 is connected to the positive terminal (+) of the AC adapter 50 to the positive side of the battery 25 and the negative terminal (−) of the AC adapter 50 to the negative side of the battery 25. A charging path is formed.

  Then, on the charging path from the positive terminal (+) of the AC adapter 50 to the positive side of the battery 25 in this charging path, the backflow prevention diode 43, the charging control FET 16, and the battery 25 are overcurrent. And a charge protection FET 17 for protecting from the above.

  Each of the discharge control FET 15, the charge control FET 16, and the charge protection FET 17 is a switching element that conducts / cuts off a discharge path or a charge path, and is driven by a control circuit 31 that controls charging / discharging of the battery 25. . The backflow prevention diode 43 is for preventing a backflow of current from the battery 25 to the AC adapter 50, and has an anode connected to the AC adapter 50 side and a cathode connected to the positive side of the battery 25. .

  In this embodiment, the discharge control FET 15 is an N-channel MOSFET, the drain is connected to the motor 7 side, and both the charge control FET 16 and the charge protection FET 17 are P-channel MOSFETs. The drain is connected to the positive electrode side of the battery 25.

  The control circuit 31 includes a microcomputer mainly composed of a CPU, a ROM, a RAM, and the like. By turning the FETs 15 to 17 on and off according to various control programs stored in the ROM, the control circuit 31 Drive and charge the battery 25.

  Specifically, the control circuit 31 receives a PWM signal (pulse signal) having a predetermined duty ratio in response to a high / low (Hi / Lo shown in the figure) drive command input from the user via the drive switch 11. (Width modulation signal) is generated and output to the discharge control FET 15.

As a result, a current corresponding to the drive command flows through the motor 7, and the motor 7 rotates at a speed corresponding to the current.
As shown in FIG. 2, the drive switch 11 is a normally open type (so-called a contact) switch, one end of which is connected to the base of the drive input transistor 47 and the other end connected to the base of the battery power supply switch 18. Has been. In this embodiment, the drive input transistor 47 is an NPN bipolar transistor, and a collector is applied with a control voltage Vc (details will be described later) via a resistor 46, and an emitter is grounded. The collector of the drive input transistor 47 is connected to the control circuit 31, and the potential of this collector is input to the control circuit 31 as a drive input signal. With such a configuration, when the control voltage Vc is applied to the collector of the drive input transistor 47 and the drive switch 11 is turned off, the drive input signal input to the control circuit 31 is at a high level ( Control voltage Vc). On the other hand, when the drive switch 11 is turned on, the drive input transistor 47 is turned on, so that the drive input signal input to the control circuit 31 is at a low level (ground potential). The control circuit 31 determines the on / off state of the drive switch 11 based on the level of the drive input signal.

  The stop switch 12 is also a normally open type (a contact) switch, one end of which is applied with a control voltage Vc via a resistor 48 and is connected to the control circuit 31, and the other end is grounded. . The potential at one end of the stop switch 12 is input to the control circuit 31 as a stop input signal. With such a configuration, when the control voltage Vc is applied to one end of the stop switch 12 via the resistor 48 and the stop switch 12 is turned off, the stop input signal input to the control circuit 31 is When the high level is reached and the stop switch 12 is turned on, the stop input signal input to the control circuit 31 becomes the low level. The control circuit 31 determines the on / off state of the stop switch 12 based on the level of the stop input signal.

  When the drive switch 11 is pushed for the first time after the operation starts, or when the drive switch 11 is pushed at the start of the operation, the control circuit 31 outputs a high-speed drive command (high ) Is recognized. Then, the discharge control FET 15 is duty-driven at a predetermined duty ratio for high-speed driving, thereby rotating the motor 7 at high speed.

  Further, when the drive switch 11 is pushed while the motor 7 is rotating at a high speed with a duty ratio for high speed drive, the control circuit 31 receives a low speed drive command (low) as a drive command from the drive switch 11. Recognize as input. Then, the motor 7 is switched to low speed rotation by duty driving the discharge control FET 15 at a predetermined low speed driving duty ratio lower than the high speed driving duty ratio.

  In addition, when the drive switch 11 is pressed while the motor 7 is rotating at a high speed with a duty ratio for low-speed driving, the control circuit 31 receives a high-speed drive command (high) as a drive command from the drive switch 11. The motor 7 is switched to high-speed rotation by recognizing that it has been input and driving the discharge control FET 15 with a duty ratio for high-speed driving.

  Thus, every time the user presses the drive switch 11, the control circuit 31 alternately switches the rotation speed of the motor 7 between the high speed rotation and the low speed rotation. When a stop command is input by the user pressing and operating the stop switch 12, the control circuit 31 turns off the discharge control FET 15 and stops driving the motor 7.

  In addition, when the AC adapter 50 is connected and the output voltage from the battery 25 is lower than the threshold voltage for determining charging start, the control circuit 31 and the charging control FET 16 and the charging circuit By switching the protection FET 17 from the off state to the on state, charging of the battery 25 is started.

  The control of charging the battery 25 by the control circuit 31 is continued until the battery 25 is fully charged. When the battery 25 is fully charged, the charge control FET 16 and the charge protection FET 17 are switched to the OFF state. Charging to the battery 25 is completed.

  Note that the control circuit 31 interrupts the charge control when the drive switch 11 is pushed while the battery 25 is being charged. Then, it recognizes that a high-speed drive command (high) is input as a drive command from the drive switch 11, and duty-drives the discharge control FET 15 at a predetermined duty ratio for high-speed drive, thereby causing the motor 7 to Rotate at high speed.

  The control circuit 31 stops the motor 7 when a stop command is input from the stop switch 12 while the motor 7 is being driven. At this time, by determining whether or not the output voltage from the battery 25 is lower than the threshold voltage, it is determined whether or not the battery 25 needs to be charged. If charging is necessary, the charging control is resumed.

  That is, even when the AC adapter 50 is connected to the DC jack 9, the handy cleaner 1 of the present embodiment can be operated as an electric vacuum cleaner by operating the electronic switch 10.

  When performing such charge / discharge control, the control circuit 31 monitors the output voltage of each cell 21 to 23 constituting the battery 25 and the temperature of the battery 25 in addition to the output voltage from the battery 25. At the time of abnormality, the charge protection FET 17 and the discharge control FET 15 are turned off, and charging / discharging of the battery 25 is stopped.

  For this reason, the control circuit board 30 is provided with a cell voltage detection unit 32 for detecting the output voltage of each cell 21 to 23 of the battery 25, and the control circuit 31 receives a cell voltage from the cell voltage detection unit 32. A detection signal representing a voltage of 21 to 23 is input.

  Further, the control circuit board 30 takes in the voltages of the cells 21 to 23 of the battery 25, and when the voltage reaches a threshold value higher than the overvoltage determination value at the time of charging by the control circuit 31 (that is, the control circuit 31). A protection circuit 34 for forcibly turning off the charge control FET 16 is also provided when the overvoltage protection due to the above does not function normally. Furthermore, the control circuit board 30 is disconnected from the cell voltage detected by the cell voltage detection unit 32 by setting the connection portions of the cells 21 to 23 in the battery 25 to a predetermined potential. A disconnection detecting unit 33 for detecting is also provided. When the control circuit 31 detects disconnection in the battery 25 using the disconnection detection unit 33, the control circuit 31 prohibits charging / discharging of the battery 25.

Further, the control circuit board 30 is provided with a regulator 35 for supplying a power supply voltage (DC constant voltage) to the above-described circuits provided on the control circuit board 30 such as the control circuit 31.
The regulator 35 can supply a DC voltage from both the battery 25 and the AC adapter 50 via the two diodes 36 and 37, and a DC constant voltage is supplied using a DC voltage supplied from either of them. (Control voltage) Vc is generated and supplied to each of the circuits as a power supply voltage.

  Since the DC voltage from the battery 25 and the DC voltage from the AC adapter 50 are configured to be input to the regulator 35 through diodes, the DC power actually supplied to the regulator 35 is the battery voltage. 25 and AC adapter 50 from either one having a higher voltage value.

  However, the battery power supply switch 18 is provided on the upstream side (anode side) of the diode 36 in the energization path from the positive electrode of the battery 25 to the regulator 35. The battery power supply switch 18 is a PNP-type bipolar transistor in this embodiment, the emitter is connected to the positive electrode of the battery 25, the collector is connected to the anode of the diode 36, and the base is the collector and drive of the base control transistor 19. Connected to one end of the switch 11. The base of the base control transistor 19 is connected to the control circuit 31, and the emitter is grounded. The base control transistor 19 is an NPN bipolar transistor in this embodiment.

  With such a configuration, the DC power supply from the battery 25 to the regulator 35 is performed when the battery power supply switch 18 is turned on. The battery power supply switch 18 is basically controlled by the control circuit 31. Specifically, during operation of the control circuit 31, the base control transistor 19 is turned on by the control circuit 31, and thereby the battery power supply switch 18 is also turned on.

  On the other hand, when a predetermined shutdown condition is satisfied during operation, the control circuit 31 turns off the battery power supply switch 18 by turning off the base control transistor 19, whereby the battery 25 to the regulator 35 is turned off. Shut off the DC power supply.

  As a shutdown condition, for example, the state where the motor 7 is stopped and the AC adapter 50 is not connected to the DC jack 9 continues for a certain period of time, or the battery 25 is charged even though the AC adapter 50 is connected. If the charging is not completed and charging is continued and the motor 7 is stopped for a certain period of time, or if a certain period of time has elapsed after the electronic switch 10 is not operated, the AC adapter 50 is connected. If the battery is not charged for a certain period of time, the cell voltage (or battery voltage) is overdischarged. Of course, these are only examples.

  When the shutdown condition is established, the control circuit 31 itself shuts off the battery power supply switch 18 to stop its own operation, and shifts to the shutdown state. When shifting to the shutdown state, the control circuit 31 cannot turn on the battery power supply switch 18 by itself.

  However, by connecting the AC adapter 50 to the DC jack 9 and supplying DC power from the DC jack 9 via the diode 37, the regulator 35 generates the control voltage Vc based on the DC power, and the control circuit 31. To supply. As a result, the control circuit 31 can be activated. Since the control circuit 31 turns on the battery power supply switch 18 by itself after startup, even if the AC adapter 50 is disconnected from the DC jack 9 after startup, the control circuit 31 maintains the control voltage Vc output from the regulator 35 by the battery power. The operation can be continued.

  Furthermore, in this embodiment, the base of the battery power supply switch 18 is connected to one end of the drive switch 11. Therefore, when the user presses the drive switch 11 while the control circuit 31 is in the shutdown state, the base of the battery power supply switch 18 and the base of the drive input transistor 47 are conducted, and the battery power supply switch 18 and the drive are driven. The input transistor 47 is turned on. As a result, battery power is supplied to the regulator 35, and the control voltage Vc is generated by the regulator 35.

That is, regardless of the control by the control circuit 31, the battery power supply switch 18 can be turned on also by pressing the drive switch 11.
When the control circuit 31 receives power supply from the regulator 35 and performs charge control for the battery 25, the control circuit 31 turns on the LED 14 to notify the user to that effect.

  Further, the control circuit board 30 detects the connection of the AC adapter 50 (specifically, detects DC power input from the AC adapter 50) and transmits it to the control circuit 31, and the like, an AC adapter detection transistor 44, a resistor 45, and the like. A circuit comprising: Specifically, the AC adapter detection transistor 44 has a base connected to the positive side of the AC adapter 50 in the charging path (specifically, the cathode side of the backflow prevention diode 43), and the emitter is grounded. The collector is applied with a control voltage Vc via a resistor 45 and is connected to the control circuit 31. The collector potential is input to the control circuit 31 as an AC adapter detection signal. Note that the AC adapter detection transistor 44 is an NPN bipolar transistor in this embodiment.

  With such a configuration, when the control voltage Vc is applied to the collector of the AC adapter detection transistor 44 and the AC adapter 50 is not connected, the AC adapter detection transistor 44 is turned off and the control circuit 31. The AC adapter detection signal input to is at a high level. On the other hand, when the AC adapter 50 is connected and DC power is input from the AC adapter 50, the AC adapter detection transistor 44 is turned on, so that the AC adapter detection signal input to the control circuit 31 is at a low level. The control circuit 31 determines whether or not the AC adapter 50 is connected based on the level of the AC adapter detection signal.

  The control circuit 31 also monitors the temperature of the battery 25. For this temperature monitoring, a detection signal from the cell temperature detection thermistor 26 provided in the battery pack 20 and a board provided on the control circuit board 30 are used. A detection signal from the temperature detection thermistor 39 is used.

  Even if one of the two types of thermistors 26 and 39 breaks down, when the battery 25 is charged, it is out of the temperature range in which the battery 25 can be charged based on the detection signal from one of the thermistors. This is so that it can be detected.

  That is, for example, when the battery 25 is charged when the temperature is lower than 0 ° C., there is a problem that lithium ions emitted from the positive electrode are not easily absorbed by the negative electrode, and lithium metal is easily deposited.

  Therefore, in the present embodiment, when the battery 25 is charged, the control circuit 31 performs a predetermined temperature check process so that the battery 25 can be charged normally using the two thermistors 26 and 39. Whether or not there is is monitored.

  In the present embodiment, one analog port and two digital ports provided in the control circuit 31 are used to capture the detection signals from the two thermistors 26 and 39 into the control circuit 31.

  This is because the number of analog ports in the microcomputer constituting the control circuit 31 is small, and there is only one analog port that can take in each A / D converted temperature detection signal (analog signal) from each thermistor 26, 39. This is because there is not.

  Each thermistor 26, 39 is a well-known temperature sensor having a characteristic that the resistance value changes with temperature. Therefore, in this embodiment, one end of the cell temperature detection thermistor 26 and the substrate temperature detection thermistor 39 is connected to one analog port of the control circuit 31, and the connection portion is connected to the regulator 35 via the resistor 38. The supplied control voltage Vc is applied.

  The other ends of the cell temperature detecting thermistor 26 and the substrate temperature detecting thermistor 39 are respectively connected to two digital ports of the control circuit 31. That is, as shown in FIG. 2, the other end of the cell temperature detection thermistor 26 is connected to one end of the cell side low-side switch 41 via the digital port of the control circuit 31. The end is connected to one end of the board-side low-side switch 42 via the digital port of the control circuit 31. The other ends of the low-side switches 41 and 42 are both grounded.

  With such a configuration, when the control circuit 31 detects the temperature via each of the thermistors 26 and 39, it turns on any of the low-side switches to which any of the thermistors to be detected is connected. Then, the other end of the thermistor to be detected is grounded to the ground.

  In this way, the control circuit 31 uses two thermistors, the cell temperature detection thermistor 26 provided in the battery pack 20 and the substrate temperature detection thermistor 39 provided in the control circuit board 30, to 25 temperatures can be monitored.

  Next, among the operations of the handy cleaner 1 of the present embodiment, a specific flow (startup sequence) when the control circuit 31 is started from the shutdown state will be described with reference to FIG.

  In order to start the control circuit 31 from the state where the control circuit 31 is shut down, the battery power supply switch 18 is turned off, and the AC adapter 50 is not connected, the AC adapter 50 is connected to the DC jack 9. Alternatively, the drive switch 11 may be pushed.

  Among these, the activation sequence when the AC adapter 50 is connected to the DC jack 9 is as shown on the left side of FIG. That is, when the AC adapter 50 is connected to the DC jack 9 while the control circuit 31 is shut down (S11), the direct current from the AC adapter 50 is transferred from the DC jack 9 to the regulator 35 via the diodes 43 and 37. Electric power is supplied (S12). As a result, the regulator 35 is activated (S13), and the control voltage Vc is generated by the regulator 35 and the control voltage Vc is supplied to the control circuit 31 (S14). As a result, the control circuit 31 is activated (S15). When the control circuit 31 is activated, it performs a predetermined initialization process, turns on the battery power supply switch 18, and maintains the on state during its own operation.

  On the other hand, the activation sequence when the user presses the drive switch 11 is as shown on the right side of FIG. That is, when the drive switch 11 is turned on (pressed) while the control circuit 31 is shut down (S21), the base of the battery power supply switch 18 is connected to the base of the drive input transistor 47 via the drive switch 11. As a result, the battery power supply switch 18 is turned on together with the drive input transistor 47 (S22). Then, battery power is supplied from the battery 25 to the regulator 35 via the battery power supply switch 18 and the diode 36 (S23). As a result, the regulator 35 is activated (S24), the control voltage Vc is generated by the regulator 35, and the control voltage Vc is supplied to the control circuit 31 (S25). As a result, the control circuit 31 is activated (S26). Also in this case, the control circuit 31 first turns on the battery power supply switch 18 after performing a predetermined initialization process after startup, and maintains the ON state during its own operation.

  Next, an operation after the control circuit 31 is started, that is, a motor driving / charging control process executed by the control circuit 31 will be described with reference to FIG. After starting, the control circuit 31 performs a predetermined initialization process, and then starts the motor drive / charge control process of FIG.

  When starting the motor drive / charge control process, the control circuit 31 first determines its own activation factor in S110. That is, it is determined whether the activation has been caused by the connection of the AC adapter 50 or the pushing operation of the drive switch 11. As described above, an AC adapter detection signal indicating whether the AC adapter 50 is connected is input to the control circuit 31. If the AC adapter detection signal is at a low level, the control circuit 31 determines that the AC adapter 50 is connected (that is, its activation is due to the connection of the AC adapter 50).

  On the other hand, based on the drive input signal input from the drive switch 11, the control circuit 31 determines that its own activation is due to a push operation of the drive switch 11 when the drive switch 11 is in an on state. To do.

  If the control circuit 31 determines that its activation factor is due to the connection of the AC adapter 50, the control circuit 31 turns on the battery power supply switch 18 and maintains the on state in S120. As a result, the regulator 35 can also be supplied with power from the battery 25. Therefore, even if the AC adapter 50 is disconnected from the DC jack 9, the generation of the control voltage Vc by the regulator 35 is continued based on the battery power. As a result, the control circuit 31 can also continue to operate.

  In S130, it is determined whether or not a charge execution condition is satisfied. Specifically, when the output voltage from the battery 25 is lower than the threshold voltage for determining charging start, it is determined that the charging execution condition is satisfied. If it is determined that the charge execution condition is satisfied, the battery 25 is charged in S140. Specifically, as described above, the battery 25 is charged by switching the charge control FET 16 and the charge protection FET 17 from the off state to the on state.

  As the charge execution condition, the cell temperature detected by the cell temperature detection thermistor 26 is within a predetermined range, and the substrate temperature detected by the substrate temperature detection thermistor 39 is within a predetermined range. You may make it include at least one of these. Further, these illustrated charge execution conditions are merely examples, and other charge execution conditions may be set.

  Then, in S150, it is determined whether or not the drive switch 11 has been turned on (pressed). If it has not been turned on, it is determined whether or not charging has been completed in S160. Specifically, it is determined whether or not the battery 25 is fully charged. If the charging is not completed, the process returns to S140 and the charging is continued. If the charging is completed, the process proceeds to S170. If the drive switch 11 is turned on by the user during charging, the process proceeds from S150 to S200, and charging is interrupted. In step S220, the motor 7 is driven.

  On the other hand, if it is determined in S130 that the charging execution condition is not satisfied, or if it is determined that charging is completed in S160, a predetermined time has elapsed in S170 from the determination in S130 or the determination in S160. It is determined whether or not preparation for shutdown is completed (shutdown condition is satisfied). If the predetermined time has not yet elapsed, it is determined in S180 whether the drive switch 11 has been turned on. If the drive switch 11 is turned on before the predetermined time has passed, the process proceeds to S220 and the motor 7 is driven.

  If the predetermined time has passed without the drive switch 11 being turned on, the process proceeds to S190 to perform shutdown. That is, the battery power supply switch 18 is turned off to stop its own operation.

  On the other hand, if the control circuit 31 determines in S110 that the activation factor is due to the pressing operation of the drive switch 11, the control circuit 31 turns on the battery power supply switch 18 and maintains the on state in S210.

  In step S220, the motor 7 is driven. That is, as described above, the motor 7 is rotated by PWM driving the discharge control FET 15. When the motor driving / charging control process is started and the motor is first driven in S220, the motor 7 is rotated at a high speed with a duty ratio for high speed driving.

  In S230, it is determined whether or not the drive switch 11 is turned on by the user. If the drive switch 11 is turned on, the PWM duty ratio is changed from the current duty ratio to the other duty ratio in S240. Switch to. That is, for example, when the processing of S240 is performed in a state where the duty ratio for high speed driving is set, the duty ratio is switched to the duty ratio for low speed driving. On the contrary, if the process of S240 is performed in a state where the duty ratio for low speed driving is set, the duty ratio for high speed driving is switched. After the duty ratio is switched, the process returns to S220, and the motor 7 is driven at the duty ratio after the switching.

  If the drive switch 11 is not turned on in S230, it is determined in S250 whether or not the stop switch 12 is turned on. When the stop switch 12 is not turned on, the process returns to S220 and the drive of the motor 7 is continued. However, when the stop switch 12 is turned on, the drive of the motor 7 is stopped at S260.

  Then, in S270, it is determined whether or not the AC adapter 50 is connected to the DC jack 9. If connected, the process proceeds to S130, and if not connected, the process proceeds to S170. In this case, in S170, it is determined whether or not a predetermined time has elapsed since it was determined in S270 that the AC adapter 50 is not connected. Then, when a predetermined time has elapsed without the drive switch 11 being turned on, the shutdown is performed in S190.

  According to the handy cleaner 1 of the present embodiment described above, it is not necessary to remove the battery pack 20 from the main body of the apparatus in order to charge the battery 25, and the AC adapter 50 is simply connected to the DC jack 9. The battery 25 can be charged simply by inputting DC power from the AC adapter 50. Therefore, the battery 25 can be easily charged without taking time and effort. The battery 25 can be charged not only via the DC jack 9, but the battery pack 20 can be taken out of the apparatus body and the battery pack 20 can be set in a predetermined charger and charged. .

  Further, when the shutdown condition is satisfied during the operation of the control circuit 31 (YES in S170), the control circuit 31 turns off the battery power supply switch 18 to stop the operation of the control circuit 31. That is, the control circuit 31 does not consume any power from the battery 25. Therefore, the battery 25 can be extended for a long time even when the battery pack 20 is mounted on the apparatus main body.

  When the control circuit 31 is in the shutdown state, the DC power is supplied to the regulator 35 when the AC adapter 50 is connected to the DC jack 9 and DC power is input or when the user turns on the drive switch 11. Then, the regulator 35 operates to generate the control voltage Vc and supply it to the control circuit 31. As a result, the control circuit 31 can be activated quickly, and the battery 25 can be charged or the motor 7 can be driven quickly.

  Further, when the control circuit 31 is activated and performs a predetermined initialization process or the like, the control circuit 31 maintains the battery power supply switch 18 in an ON state by its own control. Therefore, even if the drive switch 11 is turned off after the control circuit 31 is started up or the AC adapter 50 is removed from the DC jack 9, the control circuit 31 can continue its operation.

  Further, the DC power from the battery 25 and the DC power from the DC jack 9 are not input to separate regulators, but are input to the same regulator 35 via the diodes 36 and 37. As described above, the use of the diode makes it possible to reduce the size and cost of the entire apparatus by using only one regulator 35.

  In the present embodiment, the two diodes 36 and 37 whose cathodes are connected to the regulator 35 correspond to an example of the input power source selecting means of the present invention, and the battery power supply switch 18 is an example of the semiconductor switch of the present invention. The path from the positive electrode of the battery 25 to the diode 36 via the battery power supply switch 18 corresponds to an example of the battery power supply path of the present invention, and is input from the positive electrode side of the DC jack 9 via the diode 43 for backflow prevention. The path to the power selection diode 37 corresponds to an example of the external power supply path of the present invention, the control circuit 31 corresponds to an example of the control means of the present invention, and the drive switch 11 corresponds to an example of the operation switch of the present invention. Correspondingly, from the base of the battery power supply switch 18 to the ground through the drive switch 11 and the drive input transistor 47 Path to position corresponds to an example of the semiconductor switch on means of the present invention.

  In the motor drive / charge control process of FIG. 4, the process of S110 corresponds to an example of the process executed by the external power input determining means of the present invention, and the process of S130 is executed by the charge execution condition determining means of the present invention. This corresponds to an example of the process, and the process of S140 corresponds to an example of a process executed by the charge control unit of the present invention.

[Modification]
Although the embodiments of the present invention have been described above, the embodiments of the present invention are not limited to the above-described embodiments, and can take various forms as long as they belong to the technical scope of the present invention. Needless to say.

  For example, in the above-described embodiment, the case where the present invention is applied to the rechargeable handy cleaner 1 has been described. However, the present invention can be applied to the dust collector provided with a battery in the same manner as the above-described embodiment.

  Further, the present invention is similar to the above embodiment even in a blower that sends out gas, such as the rechargeable blower 60 shown in FIG. 5, which is used to blow off dust by sending high-pressure air, for example. Applicable to.

  Here, the rechargeable blower 60 shown in FIG. 5 includes a cylindrical nozzle 62 having a delivery port 61 for sending high-pressure air at the tip, a blower body 63 to which the rear end side of the nozzle 62 is attached, and a blower body 63. The battery pack 64 is detachably attached to the battery pack 64.

  In addition, an intake port 65 for introducing outside air is provided on the side wall of the blower main body 63, and a grip portion 66 for a user to hold on the upper side of the blower main body 63 is provided. A mounting portion 67 for mounting the battery pack 64 is provided on the side opposite to the nozzle 62.

And the electronic switch 68 for a user to operate is provided in the front-end | tip part by the side of the nozzle 62 of the holding part 66 similarly to the electronic switch 10 of the said embodiment.
In addition, the blower body 63 is supplied with electric power from a sending fan 71 for introducing outside air from the intake port 65 and sending it to the nozzle 62 side, a motor 72 for rotating the sending fan 71, and a battery pack 64. A control circuit board 73 that operates and controls driving of the motor 72 in accordance with a drive command from the electronic switch 68 is provided.

  Also in the rechargeable blower 60 configured as described above, a control circuit composed of a microcomputer is mounted on the control circuit board 73, and this control circuit is removed from the battery pack 64 in the same procedure as the control circuit 31 of the above embodiment. If a semiconductor element (FET, bipolar transistor, etc.) provided on the energization path to the motor 72 is controlled, the same effect as in the above embodiment can be obtained.

  In the above-described embodiment, bipolar transistors are used as the battery power supply switch 18 and the transistors 44 and 47, and MOSFETs are used as the control FETs 15 to 17. However, these are merely examples, and exhibit the same functions. Other types of switches can be used as long as they are.

  The configuration in which the battery power supply switch 18 is turned on by setting the base of the battery power supply switch 18 to the ground potential by turning on the drive switch 11 is merely an example. Various other specific configurations for turning on 18 are conceivable.

  DESCRIPTION OF SYMBOLS 1 ... Handy cleaner, 2 ... Main body case, 3 ... Suction port, 4 ... Discharge port, 5,66 ... Holding part, 6 ... Suction fan, 7, 72 ... Motor, 8 ... Cover, 9 ... DC jack, 10 68 ... Electronic switch, 11 ... Drive switch, 12 ... Stop switch, 14 ... LED, 15 ... Discharge control FET, 16 ... Charge control FET, 17 ... Charge protection FET, 18 ... Battery power supply switch, 19 ... Base control transistor, 20, 64 ... battery pack, 25 ... battery, 26 ... cell temperature detection thermistor, 30, 73 ... control circuit board, 31 ... control circuit, 32 ... cell voltage detector, 33 ... disconnection detector, 34 ... Protection circuit, 35 ... Regulator, 36, 37, 43 ... Diode, 38, 45, 46, 48 ... Resistance, 39 ... Thermistor for substrate temperature detection, 41 ... Low-side cell side Switch, 42 ... Low side switch on substrate side, 44 ... Transistor for detecting AC adapter, 47 ... Transistor for driving input, 50 ... AC adapter, 51 ... DC plug, 60 ... Rechargeable blower, 61 ... Outlet, 62 ... Nozzle, 67 ... Mounting part, 71 ... Sending fan

Claims (5)

A fan for aspirating or delivering gas;
A motor for rotationally driving the fan;
A battery for supplying power to the motor;
Control voltage generating means for generating a control voltage of a predetermined voltage value based on the input DC power;
A battery power supply path for supplying DC power from the battery to the control voltage generating means;
A semiconductor switch for conducting / interrupting the battery power supply path;
A DC jack for inputting DC power from an external DC power supply;
An external power supply path for supplying the DC power to the control voltage generating means when DC power is input to the DC jack;
The control voltage generated by the control voltage generating means operates as a power source, controls the power supply from the battery to the motor, controls the driving of the motor, and direct current power is input to the DC jack. If the predetermined charging execution condition is satisfied, the charging of the battery by the DC power is controlled, and when the predetermined shutdown condition is satisfied during its operation, the semiconductor switch is turned off to Control means configured to shut off power supply from a battery to the control voltage generating means;
A rechargeable fan device comprising: The rechargeable fan device according to claim 2,
An operation switch operated by a user to rotate the fan;
Semiconductor switch-on means for supplying DC power from the battery to the control voltage generating means by turning on the semiconductor switch when the operation switch is operated when the semiconductor switch is turned off;
A rechargeable fan device comprising: The rechargeable fan device according to claim 1 or 2,
The rechargeable fan device, wherein the control means controls to turn on the semiconductor switch at a predetermined timing after the start of operation. It is a rechargeable fan device given in any 1 paragraph of Claims 1-3,
The control voltage generating means
A regulator that generates the control voltage based on input DC power;
Of the DC power supplied from the DC power source supplied via the external power supply path and the DC power supplied from the battery supplied via the battery power supply path, the regulator has a higher voltage value. Input power selection means to be supplied to,
A rechargeable fan device comprising: The rechargeable fan device according to any one of claims 1 to 4,
The control means includes
External power input determination means for determining whether or not direct current power is input from the DC jack after the start of its own operation;
Charge execution condition determination means for determining whether or not the battery satisfies a predetermined charge execution condition when it is determined by the external power input determination means that direct current power is input from the DC jack;
Charge control means for controlling charging of the battery by direct current power from the DC jack when the charge execution condition determination means determines that the charge execution condition is satisfied;
A rechargeable fan device comprising:

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